Steve Ballmer, chief executive officer of Microsoft Corp., center, speaks while Stephen Elop, chief executive officer of Nokia Oyj, left, listens during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., center, speaks while Stephen Elop, chief executive officer of Nokia Oyj, left, listens during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, and Stephen Elop, chief executive officer of Nokia Oyj, shake hands after a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, and Stephen Elop, chief executive officer of Nokia Oyj, shake hands after a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, reacts while holding the new Nokia Lumia 920 smartphone with Stephen Elop, chief executive officer of Nokia Oyj, at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, reacts while holding the new Nokia Lumia 920 smartphone with Stephen Elop, chief executive officer of Nokia Oyj, at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Stephen Elop, chief executive officer of Nokia Oyj, presents the new Windows-operated Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Stephen Elop, chief executive officer of Nokia Oyj, presents the new Windows-operated Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, speaks while Stephen Elop, chief executive officer of Nokia Oyj, listens during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., right, speaks while Stephen Elop, chief executive officer of Nokia Oyj, listens during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., speaks during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., speaks during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., pauses during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

Steve Ballmer, chief executive officer of Microsoft Corp., pauses during a presentation of the new Nokia Lumia 920 smartphone at a news conference in Moscow, Russia, on Tuesday, Nov. 6, 2012. Microsoft is considering building mobile hardware as a backup, in the event that its current approach of providing software to handset makers such as Nokia Oyj and HTC Corp. falters, said the people, who requested anonymity because the plans are private. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images